Optical imaging lens assembly, image capturing unit and electronic device

ABSTRACT

An optical imaging lens assembly includes three lens elements which are, in order from an object side to an image side: a first lens element, a second lens element and a third lens element. Each of the three lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The object-side surface of the first lens element is concave in a paraxial region thereof. The object-side surface of the first lens element is aspheric and has at least one inflection point. The object-side surface of the first lens element has at least one critical point in an off-axis region thereof. The optical imaging lens assembly has a total of three lens elements.

RELATED APPLICATIONS

This application claims priority to Taiwan Application 107143264, filedon Dec. 3, 2018, which is incorporated by reference herein in itsentirety.

BACKGROUND Technical Field

The present disclosure relates to an optical imaging lens assembly, animage capturing unit and an electronic device, more particularly to anoptical imaging lens assembly and an image capturing unit applicable toan electronic device.

Description of Related Art

With the development of semiconductor manufacturing technology, theperformance of image sensors has been improved, and the pixel sizethereof has been scaled down. Therefore, featuring high image qualitybecomes one of the indispensable features of an optical system nowadays.

Furthermore, with the development of technology, biometric system hasbeen developed and widely applied to various applications. For example,mobile devices can be integrated with fingerprint identificationfunction to protect the permission and personal privacy of the users.With the development of organic light-emitting diode (OLED),under-display fingerprint identification has become the mainstream onthe market. However, conventional optical systems are unable to meet therequirements of newly developed fingerprint identification modules dueto the size thereof as well as other factors such as aperture size,field of view and image quality thereof. Therefore, there is a need todevelop an optical system applicable to biometric identificationapplications.

SUMMARY

According to one aspect of the present disclosure, an optical imaginglens assembly includes three lens elements. The three lens elements are,in order from an object side to an image side, a first lens element, asecond lens element and a third lens element. Each of the three lenselements has an object-side surface facing toward the object side and animage-side surface facing toward the image side. The object-side surfaceof the first lens element is concave in a paraxial region thereof. Theobject-side surface of the first lens element is aspheric and has atleast one inflection point. The object-side surface of the first lenselement has at least one critical point in an off-axis region thereof.The optical imaging lens assembly has a total of three lens elements.When a focal length of the optical imaging lens assembly is f, anentrance pupil diameter of the optical imaging lens assembly is EPD, anda maximum field of view of the optical imaging lens assembly is FOV, thefollowing conditions are satisfied:

0.50<f/EPD<1.9; and

100.0 [deg.]<FOV<130.0 [deg.].

According to another aspect of the present disclosure, an imagecapturing unit includes the aforementioned optical imaging lens assemblyand an image sensor, wherein the image sensor is disposed on an imagesurface of the optical imaging lens assembly.

According to still another aspect of the present disclosure, anelectronic device includes a fingerprint identification module, whereinthe fingerprint identification module includes the aforementioned imagecapturing unit.

According to yet another aspect of the present disclosure, an opticalimaging lens assembly includes three lens elements. The three lenselements are, in order from an object side to an image side, a firstlens element, a second lens element and a third lens element. Each ofthe three lens elements has an object-side surface facing toward theobject side and an image-side surface facing toward the image side. Theobject-side surface of the first lens element is concave in a paraxialregion thereof. The object-side surface of the first lens element isaspheric and has at least one inflection point. The object-side surfaceof the first lens element has at least one critical point in an off-axisregion thereof. The optical imaging lens assembly has a total of threelens elements. When a curvature radius of the object-side surface of thefirst lens element is R1, and an entrance pupil diameter of the opticalimaging lens assembly is EPD, the following condition is satisfied:

−4.0<R1/EPD<0.

According to yet still another aspect of the present disclosure, anelectronic device includes a fingerprint identification module and alight-permeable sheet. The fingerprint identification module includes anoptical imaging lens assembly. The optical imaging lens assemblyincludes a plurality of lens elements. Each of the plurality of lenselements has an object-side surface facing toward an object side of theoptical imaging lens assembly and an image-side surface facing toward animage side of the optical imaging lens assembly. At least one lenselement of the optical imaging lens assembly has at least one lenssurface having at least one critical point in an off-axis regionthereof. The light-permeable sheet is disposed between the opticalimaging lens assembly and an imaged object. When a sum of centralthicknesses of all lens elements of the optical imaging lens assembly isΣCT, and a central thickness of the light-permeable sheet is CTP, thefollowing condition is satisfied:

0<ΣCT/CTP<1.50.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be better understood by reading the followingdetailed description of the embodiments, with reference made to theaccompanying drawings as follows:

FIG. 1 is a schematic view of an image capturing unit and alight-permeable sheet according to the 1st embodiment of the presentdisclosure;

FIG. 2 is a schematic view of the image capturing unit in FIG. 1;

FIG. 3 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 1stembodiment;

FIG. 4 is a schematic view of an image capturing unit and alight-permeable sheet according to the 2nd embodiment of the presentdisclosure;

FIG. 5 is a schematic view of the image capturing unit in FIG. 4;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 2ndembodiment;

FIG. 7 is a schematic view of an image capturing unit and alight-permeable sheet according to the 3rd embodiment of the presentdisclosure;

FIG. 8 is a schematic view of the image capturing unit in FIG. 7;

FIG. 9 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 3rdembodiment;

FIG. 10 is a schematic view of an image capturing unit and alight-permeable sheet according to the 4th embodiment of the presentdisclosure;

FIG. 11 is a schematic view of the image capturing unit in FIG. 10;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 4thembodiment;

FIG. 13 is a schematic view of an image capturing unit and alight-permeable sheet according to the 5th embodiment of the presentdisclosure;

FIG. 14 is a schematic view of the image capturing unit in FIG. 13;

FIG. 15 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 5thembodiment;

FIG. 16 is a schematic view of an image capturing unit and alight-permeable sheet according to the 6th embodiment of the presentdisclosure;

FIG. 17 is a schematic view of the image capturing unit in FIG. 16;

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 6thembodiment;

FIG. 19 is a schematic view of an image capturing unit and alight-permeable sheet according to the 7th embodiment of the presentdisclosure;

FIG. 20 is a schematic view of the image capturing unit in FIG. 19;

FIG. 21 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 7thembodiment;

FIG. 22 is a schematic view of an image capturing unit and alight-permeable sheet according to the 8th embodiment of the presentdisclosure;

FIG. 23 is a schematic view of the image capturing unit in FIG. 22;

FIG. 24 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 8thembodiment;

FIG. 25 is a perspective view of an electronic device according to the9th embodiment of the present disclosure;

FIG. 26 is a schematic view of the electronic device in FIG. 25identifying a fingerprint;

FIG. 27 is a perspective view of an electronic device according to the10th embodiment of the present disclosure;

FIG. 28 is a schematic view of the electronic device in FIG. 27identifying a fingerprint;

FIG. 29 shows a schematic view of Y11, Yc11, Y32 and inflection pointsand critical points of the first through third lens elements accordingto the 1st embodiment of the present disclosure; and

FIG. 30 shows a schematic view of YOB, CTP, TOB, TL and ImgH accordingto the 1st embodiment of the present disclosure.

DETAILED DESCRIPTION

An electronic device includes a fingerprint identification module and alight-permeable sheet. The fingerprint identification module includes anoptical imaging lens assembly, and the optical imaging lens assemblyincludes a plurality of lens elements. Each of the plurality of lenselements of the optical imaging lens assembly has an object-side surfacefacing toward an object side of the optical imaging lens assembly and animage-side surface facing toward an image side of the optical imaginglens assembly. The plurality of lens elements includes a first lenselement closest to an imaged object. The light-permeable sheet isdisposed on the object side of the optical imaging lens assembly andlocated between the first lens element and the imaged object. Theoptical imaging lens assembly may include three lens element, and thethree lens elements are, in order from the object side to the imageside, the first lens element, a second lens element and a third lenselement.

When the optical imaging lens assembly has a total of three lenselements, it is favorable for obtaining a balance among the aperturesize, the field of view, the image quality and the size of the opticalimaging lens assembly. However, the present disclosure is not limited tothe number of lens elements. The optical imaging lens assembly may havedifferent numbers of lens elements depending on applicationrequirements. For example, the optical imaging lens assembly may includefour or five lens elements; that is, the optical imaging lens assemblymay further include a fourth lens element and a fifth lens element. Insome configurations, the optical imaging lens assembly may have a totalof two lens elements.

The object-side surface of the first lens element can be concave in aparaxial region thereof; therefore, it is favorable for the first lenselement to have proper refractive power, and also favorable foradjusting the field of view and keeping the optical imaging lensassembly compact. The first lens element can have negative refractivepower; therefore, it is favorable for the optical imaging lens assemblyto achieve a wide field of view configuration.

The third lens element can have positive refractive power; therefore, itis favorable for reducing the total track length of the optical imaginglens assembly. The object-side surface of the third lens element can beconvex in a paraxial region thereof; therefore, it is favorable foradjusting the refractive power of the third lens element so as tocorrect aberrations and reduce the total track length. The image-sidesurface of the third lens element can be convex in a paraxial regionthereof; therefore, it is favorable for adjusting the travellingdirection of light rays so as to reduce aberrations such as distortionof wide angle images.

According to the present disclosure, at least one lens element of theoptical imaging lens assembly can have at least one aspheric surfacehaving at least one inflection point. Therefore, it is favorable forincreasing the shape variation of the lens elements so as to reduce thesize of the optical imaging lens assembly and improve image quality. Inone configuration, each of at least two lens elements of the opticalimaging lens assembly can have at least one aspheric surface having atleast one inflection point. In another configuration, each of at leastthree lens elements of the optical imaging lens assembly can have atleast one aspheric surface having at least one inflection point. Pleaserefer to FIG. 29, which shows a schematic view of inflection points P ofthe first lens element 110, the second lens element 120 and the thirdlens element 130 according to the 1st embodiment of the presentdisclosure.

The object-side surface of the first lens element can be aspheric, andthe object-side surface of the first lens element can have at least oneinflection point. Therefore, it is favorable for the optical imaginglens assembly to have a large aperture and wide field of viewconfiguration by adjusting the shape of the first lens element.

The object-side surface of the third lens element can be aspheric, andthe object-side surface of the third lens element can have at least oneinflection point. Therefore, it is favorable for reducing aberrations onthe peripheral region of the image surface so as to improve peripheralimage quality.

According to the present disclosure, at least one lens element of theoptical imaging lens assembly can have at least one lens surface havingat least one critical point in an off-axis region thereof. Therefore, itis favorable for further increasing the shape variation of the lenselements so as to enhance peripheral illuminance and improve peripheralimage quality. In one configuration, each of at least two lens elementsof the optical imaging lens assembly can have at least one lens surfacehaving at least one critical point in an off-axis region thereof. Inanother configuration, each of at least three lens elements of theoptical imaging lens assembly can have at least one lens surface havingat least one critical point in an off-axis region thereof. Please referto FIG. 29, which shows a schematic view of critical points C of thefirst lens element 110, the second lens element 120 and the third lenselement 130 according to the 1st embodiment of the present disclosure.

The object-side surface of the first lens element can have at least onecritical point in an off-axis region thereof, and the critical point canbe a convex critical point. Therefore, it is favorable for adjusting thetravelling direction of light at wide field of view so as to reduceaberrations such as distortion and further improve peripheral imagequality.

The object-side surface of the third lens element can have at least onecritical point in an off-axis region thereof, and the critical point canbe a concave critical point. Therefore, it is favorable for furtherimproving image quality on the peripheral region of the image surface,and also favorable for increasing peripheral illuminance.

When a focal length of the optical imaging lens assembly is f, and anentrance pupil diameter of the optical imaging lens assembly is EPD, thefollowing condition can be satisfied: 0.50<f/EPD<1.9. Therefore, it isfavorable for obtaining a balance between the field of view and aperturesize. In one configuration, the following condition can also besatisfied: 1.0<f/EPD<1.7.

When a maximum field of view of the optical imaging lens assembly isFOV, the following condition can be satisfied: 90.0 [deg.]<FOV<140.0[deg.]. Therefore, it is favorable for the optical imaging lens assemblyto have sufficient field of view for various applications, and alsofavorable for preventing overly large distortion cause by overly widefield of view. In one configuration, the following condition can also besatisfied: 100.0 [deg.]<FOV<130.0 [deg.].

When a curvature radius of the object-side surface of the first lenselement is R1, and the entrance pupil diameter of the optical imaginglens assembly is EPD, the following condition can be satisfied:−4.0<R1/EPD<0. Therefore, it is favorable for the optical imaging lensassembly to obtain a balance between miniaturization and large apertureby adjusting the shape of the first lens element and the size of theaperture stop. In one configuration, the following condition can also besatisfied: −3.5<R1/EPD<−0.5. In another configuration, the followingcondition can also be satisfied: −3.0<R1/EPD<−1.0.

When a sum of central thicknesses of all lens elements of the opticalimaging lens assembly is ΣCT, and a central thickness of thelight-permeable sheet is CTP, the following condition can be satisfied:0<ΣCT/CTP<1.50. Therefore, it is favorable for adjusting the ratiobetween the thicknesses of the light-permeable sheet and the lenselements of the optical imaging lens assembly so as to achievecompactness. In one configuration, the following condition can also besatisfied: 0.20<ΣCT/CTP<1.10. In another configuration, the followingcondition can also be satisfied: 0.40<ΣCT/CTP<0.90. Please refer to FIG.30, which shows a schematic view of CTP according to the 1st embodimentof the present disclosure.

When an Abbe number of the first lens element is V1, an Abbe number ofthe second lens element is V2, and an Abbe number of the third lenselement is V3, at least one of the following conditions can besatisfied: 10.0<V1<65.0; 10.0<V2<65.0; and 10.0<V3<65.0. Therefore, whenat least one of the above conditions is satisfied, it is favorable forcorrecting aberrations and increasing mass production by having propermaterial selection of the lens elements. In one configuration, at leastone of the following conditions can also be satisfied: 45.0<V1<60.0;45.0<V2<60.0; and 45.0<V3<60.0. In another configuration, at least oneof the following conditions can also be satisfied: 50.0<V1<60.0;50.0<V2<60.0; and 50.0<V3<60.0. According to the present disclosure, theAbbe number V of one lens element is obtained from the followingequation: V=(Nd−1)/(NF−NC), wherein Nd is the refractive index of saidlens element at the wavelength of helium d-line (587.6 nm), NF is therefractive index of said lens element at the wavelength of hydrogenF-line (486.1 nm), and NC is the refractive index of said lens elementat the wavelength of hydrogen C-line (656.3 nm).

When a maximum value among Abbe numbers of all lens elements of theoptical imaging lens assembly is Vmax, and a minimum value among Abbenumbers of all lens elements of the optical imaging lens assembly isVmin, the following condition can be satisfied: Vmax−Vmin<15.0.Therefore, a proper selection of materials of the lens elements isfavorable for correcting aberrations, and the effect of aberrationcorrection is more significant when the optical imaging lens assembly isoperated within narrower wavelength range of light and thus having alower need for correcting chromatic aberration. In one configuration,the following condition can also be satisfied: Vmax−Vmin<10.0. Inanother configuration, the following condition can also be satisfied:Vmax−Vmin<5.0.

When the sum of central thicknesses of all lens elements of the opticalimaging lens assembly is ΣCT, and a sum of axial distances between eachof all adjacent lens elements of the optical imaging lens assembly isΣAT, the following condition can be satisfied: 1.2<ΣCT/ΣAT<2.8.Therefore, it is favorable for adjusting the axial thicknesses and axialdistances between the lens elements so as to reduce the size of theoptical imaging lens assembly. In one configuration, the followingcondition can also be satisfied: 1.3<ΣCT/ΣAT<2.4.

When an axial distance between the first lens element and the secondlens element is T12, and an axial distance between the second lenselement and the third lens element is T23, the following condition canbe satisfied: 8.0<T12/T23<40.0. Therefore, it is favorable for adjustingthe ratio of the axial distances between the lens elements so as tocorrect aberrations and reduce the size of the optical imaging lensassembly. In one configuration, the following condition can also besatisfied: 12.5<T12/T23<30.0.

When an axial distance between the object-side surface of the first lenselement and an image surface is TL, and the focal length of the opticalimaging lens assembly is f, the following condition can be satisfied:5.9<TL/f<8.5. Therefore, it is favorable for obtaining a balance betweenthe miniaturization and large field of view of the optical imaging lensassembly. Please refer to FIG. 30, which shows a schematic view of TLaccording to the 1st embodiment of the present disclosure.

When the curvature radius of the object-side surface of the first lenselement is R1, and the focal length of the optical imaging lens assemblyis f, the following condition can be satisfied: −4.0<R1/f<0. Therefore,it is favorable for the first lens element to have proper refractivepower. In one configuration, the following condition can also besatisfied: −2.5<R1/f<0.

When the focal length of the optical imaging lens assembly is f, theentrance pupil diameter of the optical imaging lens assembly is EPD, andhalf of the maximum field of view of the optical imaging lens assemblyis HFOV, the following condition can be satisfied:1.0<f/EPD+cot(HFOV)<2.3. Therefore, it is favorable for adjusting thefield of view and aperture size of the optical imaging lens assembly soas to meet requirements of various applications. In one configuration,the following condition can also be satisfied: 1.5<f/EPD+cot(HFOV)<2.2.

When the focal length of the optical imaging lens assembly is f, a focallength of the first lens element is f1, a focal length of the secondlens element is f2, and a focal length of the third lens element is f3,at least one of the following conditions can be satisfied: |f/f1|<0.50;|f/f2|<0.80; and |f/f3|<0.80. Therefore, when at least one of the aboveconditions is satisfied, it is favorable for the first through thirdlens elements to have proper refractive power so as to adjust the fieldof view and reduce aberrations generated by each lens element. In oneconfiguration, at least one of the following condition cans also besatisfied: 0.20<|f/f1|; and |f/f2|<0.30.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, the following condition can besatisfied: TL<6.0 [mm]. Therefore, it is favorable for theminiaturization of the optical imaging lens assembly for variousapplications. In one configuration, the following condition can also besatisfied: TL<4.0 [mm]. In another configuration, the followingcondition can also be satisfied: TL<3.0 [mm]. In yet anotherconfiguration, the following condition can also be satisfied: TL<2.4[mm].

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and the entrance pupildiameter of the optical imaging lens assembly is EPD, the followingcondition can be satisfied: 1.0<TL/EPD<16.0. Therefore, it is favorablefor obtaining a balance between the miniaturization and large aperturestop of the optical imaging lens assembly. In one configuration, thefollowing condition can also be satisfied: 5.0<TL/EPD<11.0.

When a maximum effective radius of the object-side surface of the firstlens element is Y11, and a maximum effective radius of the image-sidesurface of the third lens element is Y32, the following condition can besatisfied: 1.25<Y11/Y32<2.40. Therefore, it is favorable for adjustingthe ratio between the outer diameters of the lens elements so as to meetthe requirements for the field of view and size of the optical imaginglens assembly. Please refer to FIG. 29, which shows a schematic view ofY11 and Y32 according to the 1st embodiment of the present disclosure.

When a vertical distance between the critical point on the object-sidesurface of the first lens element and an optical axis is Yc11, and themaximum effective radius of the object-side surface of the first lenselement is Y11, the following condition can be satisfied:0.30<Yc11/Y11<0.90. Therefore, it is favorable for adjusting theposition of the critical point so as to further improve image quality.In one configuration, the following condition can also be satisfied:0.45<Yc11/Y11<0.70. Please refer to FIG. 29, which shows a schematicview of Y11 and Yc11 according to the 1st embodiment of the presentdisclosure.

According to the present disclosure, at least two lens elements of theoptical imaging lens assembly can be made of plastic material.Therefore, it is favorable for reducing manufacturing cost andincreasing design flexibility of the optical imaging lens assembly so asto optimize the capability for correcting off-axis aberrations. In oneconfiguration, at least three lens elements of the optical imaging lensassembly can be made of plastic material.

According to the present disclosure, the optical imaging lens assemblycan be operated within a wavelength range of 400 nanometers (nm) to 700nm. Therefore, using visible light as a light source is favorable forreducing the need of additional light sources, and the optical imaginglens assembly can work with light rays emitting from OLED displays. Inone configuration, the optical imaging lens assembly can be operatedwithin a wavelength range of 480 nm to 600 nm. In another configuration,the optical imaging lens assembly can be operated within a wavelengthrange of 500 nm to 575 nm.

When an axial distance between the imaged object and the object-sidesurface of the first lens element is TOB, and the axial distance betweenthe object-side surface of the first lens element and the image surfaceis TL, the following condition can be satisfied: 0.50 [mm]<TOB+TL<8.0[mm]. Therefore, it is favorable for the imaged object and the imagesurface to have a proper distance therebetween so as to obtain a balancebetween the miniaturization and image quality of the optical imaginglens assembly. In one configuration, the following condition can also besatisfied: 1.0 [mm]<TOB+TL<7.0 [mm]. In another configuration, thefollowing condition can also be satisfied: 1.5 [mm]<TOB+TL<6.0 [mm].Please refer to FIG. 30, which shows a schematic view of TOB and TLaccording to the 1st embodiment of the present disclosure.

When the axial distance between the imaged object and the object-sidesurface of the first lens element is TOB, the axial distance between theobject-side surface of the first lens element and the image surface isTL, and the entrance pupil diameter of the optical imaging lens assemblyis EPD, the following condition can be satisfied: (TOB+TL)/EPD<28.0.Therefore, it is favorable for obtaining a balance among theminiaturization, high image quality and large aperture of the opticalimaging lens assembly. In one configuration, the following condition canalso be satisfied: 10.0<(TOB+TL)/EPD<25.0.

When a maximum image height of the optical imaging lens assembly (halfof a diagonal length of an effective photosensitive area of an imagesensor) is ImgH, and an object height corresponding to the maximum imageheight of the optical imaging lens assembly is YOB, the followingcondition can be satisfied: YOB/ImgH<40.0; therefore, it is favorablefor adjusting the optical magnification for various applications. In oneconfiguration, the following condition can also be satisfied:YOB/ImgH<20.0. In another configuration, the following condition canalso be satisfied: YOB/ImgH<9.0. In still another configuration, thefollowing condition can also be satisfied: 2.0<YOB/ImgH; therefore, itis favorable for preventing overly large optical magnification so as toobtain a proper balance between the miniaturization and image quality ofthe optical imaging lens assembly. In one configuration, the followingcondition can also be satisfied: 4.0<YOB/ImgH. In another configuration,the following condition can also be satisfied: 6.0<YOB/ImgH. In yetanother configuration, the following condition can also be satisfied:2.0<YOB/ImgH<9.0. Please refer to FIG. 30, which shows a schematic viewof YOB and ImgH according to the 1st embodiment of the presentdisclosure. When the axial distance between the imaged object and theobject-side surface of the first lens element is TOB, and the axialdistance between the object-side surface of the first lens element andthe image surface is TL, the following condition can be satisfied:0.50<TOB/TL<2.0. Therefore, it is favorable for adjusting the ratio ofthe object distance to the total track length of the optical imaginglens assembly so as to have a proper field of view. In oneconfiguration, the following condition can also be satisfied:0.80<TOB/TL<1.5.

When the central thickness of the light-permeable sheet is CTP, thefollowing condition can be satisfied: 0.2 [mm]<CTP<3.0 [mm]. Therefore,it is favorable for preventing the light-permeable sheet from beingoverly thick so as to reduce the size; furthermore, it's also favorablefor preventing the light-permeable sheet from being overly thin so as toensure that the light-permeable sheet has sufficient structural strengthagainst external forces. In one configuration, the following conditioncan also be satisfied: 0.8 [mm]<CTP<2.2 [mm]. In another configuration,the following condition can also be satisfied: 1.2 [mm]<CTP<1.8 [mm].

According to the present disclosure, the aforementioned features andconditions can be utilized in numerous combinations so as to achievecorresponding effects.

According to the present disclosure, the lens elements of the opticalimaging lens assembly can be made of either glass or plastic material.When the lens elements are made of glass material, the refractive powerdistribution of the optical imaging lens assembly may be more flexible.The glass lens element can either be made by grinding or molding. Whenthe lens elements are made of plastic material, the manufacturing costcan be effectively reduced. Furthermore, surfaces of each lens elementcan be arranged to be aspheric, which allows more control variables foreliminating aberrations thereof, the required number of the lenselements can be reduced, and the total track length of the opticalimaging lens assembly can be effectively shortened. The asphericsurfaces may be formed by plastic injection molding or glass molding.

According to the present disclosure, one or more of the lens elements'material may optionally include an additive which alters the lenselements' transmittance in a specific range of wavelength for areduction in unwanted stray light or colour deviation. For example, theadditive may optionally filter out light in the wavelength range of 600nm to 800 nm to reduce excessive red light and/or near infrared light;or may optionally filter out light in the wavelength range of 350 nm to450 nm to reduce excessive blue light and/or near ultraviolet light frominterfering the final image. The additive may be homogeneously mixedwith a plastic material to be used in manufacturing a mixed-materiallens element by injection molding.

According to the present disclosure, when a lens surface is aspheric, itmeans that the lens surface has an aspheric shape throughout itsoptically effective area, or a portion(s) thereof.

According to the present disclosure, each of an object-side surface andan image-side surface has a paraxial region and an off-axis region. Theparaxial region refers to the region of the surface where light raystravel close to the optical axis, and the off-axis region refers to theregion of the surface away from the paraxial region. Particularly,unless otherwise stated, when the lens element has a convex surface, itindicates that the surface is convex in the paraxial region thereof;when the lens element has a concave surface, it indicates that thesurface is concave in the paraxial region thereof. Moreover, when aregion of refractive power or focus of a lens element is not defined, itindicates that the region of refractive power or focus of the lenselement is in the paraxial region thereof.

According to the present disclosure, when the parameters (e.g.,refractive index and focal length) of the optical imaging lens assembly,the image capturing unit and the electronic device are not specificallydefined, these parameters may be determined according to the operatingwavelength range.

According to the present disclosure, an inflection point is a point onthe surface of the lens element at which the surface changes fromconcave to convex, or vice versa. A critical point is a non-axial pointof the lens surface where its tangent is perpendicular to the opticalaxis.

According to the present disclosure, an image surface of the opticalimaging lens assembly, based on the corresponding image sensor, can beflat or curved, especially a curved surface being concave facing towardsthe object side of the optical imaging lens assembly.

According to the present disclosure, an image correction unit, such as afield flattener, can be optionally disposed between the lens elementclosest to the image side of the optical imaging lens assembly and theimage surface for correction of aberrations such as field curvature. Theoptical properties of the image correction unit, such as curvature,thickness, index of refraction, position and surface shape (convex orconcave surface with spherical, aspheric, diffractive or Fresnel types),can be adjusted according to the design of an image capturing unit. Ingeneral, a preferable image correction unit is, for example, a thintransparent element having a concave object-side surface and a planarimage-side surface, and the thin transparent element is disposed nearthe image surface.

According to the present disclosure, the optical imaging lens assemblycan include at least one stop, such as an aperture stop, a glare stop ora field stop. Said glare stop or said field stop is set for eliminatingthe stray light and thereby improving image quality thereof.

According to the present disclosure, an aperture stop can be configuredas a front stop or a middle stop. A front stop disposed between animaged object and the first lens element can provide a longer distancebetween an exit pupil of the optical imaging lens assembly and the imagesurface to produce a telecentric effect, and thereby improves theimage-sensing efficiency of an image sensor (for example, CCD or CMOS).A middle stop disposed between the first lens element and the imagesurface is favorable for enlarging the viewing angle of the opticalimaging lens assembly and thereby provides a wider field of view for thesame.

According to the present disclosure, the optical imaging lens assemblycan include an aperture control unit. The aperture control unit may be amechanical component or a light modulator, which can control the sizeand shape of the aperture through electricity or electrical signals. Themechanical component can include a movable member, such as a bladeassembly or a light baffle. The light modulator can include a shieldingelement, such as a filter, an electrochromic material or aliquid-crystal layer. The aperture control unit controls the amount ofincident light or exposure time to enhance the capability of imagequality adjustment. In addition, the aperture control unit can be theaperture stop of the present disclosure, which changes the f-number toobtain different image effects, such as the depth of field or lensspeed.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an image capturing unit and alight-permeable sheet according to the 1st embodiment of the presentdisclosure. FIG. 2 is a schematic view of the image capturing unit inFIG. 1. FIG. 3 shows, in order from left to right, spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagecapturing unit according to the 1st embodiment. In FIG. 1 and FIG. 2,the image capturing unit includes the optical imaging lens assembly (itsreference numeral is omitted) of the present disclosure and an imagesensor 170. The optical imaging lens assembly includes, in order from anobject side to an image side, a first lens element 110, an aperture stop100, a second lens element 120, a stop 101, a third lens element 130, afilter 150 and an image surface 160. The optical imaging lens assemblyincludes three lens elements (110, 120 and 130) with no additional lenselement disposed between each of the adjacent three lens elements. Alight-permeable sheet 140 is disposed between an imaged object O and theoptical imaging lens assembly.

The first lens element 110 with negative refractive power has anobject-side surface 111 being concave in a paraxial region thereof andan image-side surface 112 being concave in a paraxial region thereof.The first lens element 110 is made of plastic material and has theobject-side surface 111 and the image-side surface 112 being bothaspheric. The object-side surface 111 of the first lens element 110 hastwo inflection points. The image-side surface 112 of the first lenselement 110 has one inflection point. The object-side surface 111 of thefirst lens element 110 has one critical point in an off-axis regionthereof.

The second lens element 120 with negative refractive power has anobject-side surface 121 being concave in a paraxial region thereof andan image-side surface 122 being concave in a paraxial region thereof.The second lens element 120 is made of plastic material and has theobject-side surface 121 and the image-side surface 122 being bothaspheric. The object-side surface 121 of the second lens element 120 hastwo inflection points. The image-side surface 122 of the second lenselement 120 has one inflection point. The object-side surface 121 of thesecond lens element 120 has two critical points in an off-axis regionthereof. The image-side surface 122 of the second lens element 120 hasone critical point in an off-axis region thereof.

The third lens element 130 with positive refractive power has anobject-side surface 131 being convex in a paraxial region thereof and animage-side surface 132 being convex in a paraxial region thereof. Thethird lens element 130 is made of plastic material and has theobject-side surface 131 and the image-side surface 132 being bothaspheric. The object-side surface 131 of the third lens element 130 hasone inflection point. The image-side surface 132 of the third lenselement 130 has two inflection points. The object-side surface 131 ofthe third lens element 130 has one concave critical point in an off-axisregion thereof.

The light-permeable sheet 140 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter150 is made of glass material and located between the third lens element130 and the image surface 160, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 170 is disposed onor near the image surface 160 of the optical imaging lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y/R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{i} \right)}}}},$

where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from an optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient, and in the embodiments, i may be,but is not limited to, 4, 6, 8, 10, 12, 14, 16, 18 and 20.

In the optical imaging lens assembly of the image capturing unitaccording to the 1st embodiment, when a focal length of the opticalimaging lens assembly is f, an f-number of the optical imaging lensassembly in a working distance (in this condition, the working distanceincludes the thickness of the light-permeable sheet) is Fno(work), anf-number of the optical imaging lens assembly for imaged object at aninfinite distance is Fno(inf.), and half of a maximum field of view ofthe optical imaging lens assembly is HFOV, these parameters have thefollowing values: f=0.34 millimeters (mm), Fno(work)=1.51,Fno(inf.)=1.48, HFOV=60.7 degrees (deg.).

When an Abbe number of the first lens element 110 is V1, the followingcondition is satisfied: V1=56.0.

When an Abbe number of the second lens element 120 is V2, the followingcondition is satisfied: V2=56.0.

When an Abbe number of the third lens element 130 is V3, the followingcondition is satisfied: V3=56.0.

When a maximum value among Abbe numbers of all lens elements of theoptical imaging lens assembly is Vmax, and a minimum value among Abbenumbers of all lens elements of the optical imaging lens assembly isVmin, the following condition is satisfied: Vmax−Vmin=0.0. In thisembodiment, the Abbe numbers of the first lens element 110, the secondlens element 120 and the third lens element 130 are the same, so Vmaxand Vmin are both equal to the Abbe numbers of the first lens element110, the second lens element 120 and the third lens element 130.

When a sum of central thicknesses of all lens elements of the opticalimaging lens assembly is ΣCT, and a sum of axial distances between eachof all adjacent lens elements of the optical imaging lens assembly isΣAT, the following condition is satisfied: ΣCT/ΣAT=1.93. In thisembodiment, an axial distance between two adjacent lens elements is anair gap in a paraxial region between the two adjacent lens elements. ΣCTis a sum of the central thicknesses of the first lens element 110, thesecond lens element 120 and the third lens element 130; ΣAT is a sum ofthe axial distance between the first lens element 110 and the secondlens element 120, and the axial distance between the second lens element120 and the third lens element 130.

When the sum of central thicknesses of all lens elements of the opticalimaging lens assembly is ΣCT, and a central thickness of thelight-permeable sheet 140 is CTP, the following condition is satisfied:ΣCT/CTP=0.70.

When the central thickness of the light-permeable sheet 140 is CTP, thefollowing condition is satisfied: CTP=1.50 [mm].

When the axial distance between the first lens element 110 and thesecond lens element 120 is T12, and the axial distance between thesecond lens element 120 and the third lens element 130 is T23, thefollowing condition is satisfied: T12/T23=17.07.

When an axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 160 is TL, the followingcondition is satisfied: TL=2.28 [mm].

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 160 is TL, and an entrance pupildiameter of the optical imaging lens assembly is EPD, the followingcondition is satisfied: TL/EPD=9.92.

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 160 is TL, and the focal lengthof the optical imaging lens assembly is f, the following condition issatisfied: TL/f=6.71.

When an axial distance between the imaged object O and the object-sidesurface 111 of the first lens element 110 is TOB, and the axial distancebetween the object-side surface 111 of the first lens element 110 andthe image surface 160 is TL, the following condition is satisfied:TOB+TL=4.98 [mm].

When the axial distance between the imaged object O and the object-sidesurface 111 of the first lens element 110 is TOB, the axial distancebetween the object-side surface 111 of the first lens element 110 andthe image surface 160 is TL, and the entrance pupil diameter of theoptical imaging lens assembly is EPD, the following condition issatisfied: (TOB+TL)/EPD=21.67.

When the axial distance between the imaged object O and the object-sidesurface 111 of the first lens element 110 is TOB, and the axial distancebetween the object-side surface 111 of the first lens element 110 andthe image surface 160 is TL, the following condition is satisfied:TOB/TL=1.18.

When a curvature radius of the object-side surface 111 of the first lenselement 110 is R1, and the entrance pupil diameter of the opticalimaging lens assembly is EPD, the following condition is satisfied:R1/EPD=−2.56. When the curvature radius of the object-side surface 111of the first lens element 110 is R1, and the focal length of the opticalimaging lens assembly is f, the following condition is satisfied:R1/f=−1.73.

When the focal length of the optical imaging lens assembly is f, and theentrance pupil diameter of the optical imaging lens assembly is EPD, thefollowing condition is satisfied: f/EPD=1.48.

When the focal length of the optical imaging lens assembly is f, theentrance pupil diameter of the optical imaging lens assembly is EPD, andhalf of the maximum field of view of the optical imaging lens assemblyis HFOV, the following condition is satisfied: f/EPD+cot(HFOV)=2.04.

When the focal length of the optical imaging lens assembly is f, and afocal length of the first lens element 110 is f1, the followingcondition is satisfied: |f/f1|=0.45.

When the focal length of the optical imaging lens assembly is f, and afocal length of the second lens element 120 is f2, the followingcondition is satisfied: |f/f21=0.03.

When the focal length of the optical imaging lens assembly is f, and afocal length of the third lens element 130 is f3, the followingcondition is satisfied: |f/f3|=0.63.

When the maximum field of view of the optical imaging lens assembly isFOV, the following condition is satisfied: FOV=121.4 [deg.].

When a maximum effective radius of the object-side surface 111 of thefirst lens element 110 is Y11, and a maximum effective radius of theimage-side surface 132 of the third lens element 130 is Y32, thefollowing condition is satisfied: Y11/Y32=1.70.

When a vertical distance between the critical point on the object-sidesurface 111 of the first lens element 110 and the optical axis is Yc11,and the maximum effective radius of the object-side surface 111 of thefirst lens element 110 is Y11, the following condition is satisfied:Yc11/Y11=0.58.

When a maximum image height of the optical imaging lens assembly isImgH, and an object height corresponding to the maximum image height ofthe optical imaging lens assembly is YOB, the following condition issatisfied: YOB/ImgH=7.72.

The detailed optical data of the 1st embodiment are shown in Table 1 andthe aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 0.34 mm, Fno(work) = 1.51, Fno(inf.) = 1.48,HFOV = 60.7 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.202 3 Lens 1 −0.589 (ASP) 0.250 Plastic 1.548 56.0−0.76 4 1.614 (ASP) 0.491 5 Ape. Stop Plano 0.021 6 Lens 2 −100.000(ASP) 0.330 Plastic 1.548 56.0 −12.64 7 7.450 (ASP) −0.014 8 Stop Plano0.044 9 Lens 3 0.421 (ASP) 0.465 Plastic 1.548 56.0 0.54 10 −0.595 (ASP)0.141 11 Filter Plano 0.110 Glass 1.520 64.2 — 12 Plano 0.444 13 ImagePlano — Note: Reference wavelength is 525.0 nm. The working distance isthe axial distance (2.702 mm) between the imaged object O (Surface 0)and the object-side surface 111 (Surface 3). An effective radius of thestop 101 (Surface 8) is 0.370 mm.

TABLE 2 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −2.1520E+00 0.0000E+00 9.0000E+01  9.0000E+01 −4.6642E−01 0.0000E+00 A4 = 1.6242E+00 −6.8064E−01 7.0403E+00 −1.3875E+01 −1.8695E+01 4.5803E+00 A6=  1.6310E+01 −8.0063E+01 −8.3341E+02  −6.8089E+01  2.9828E+02−4.8914E+01  A8 = −1.6875E+02  6.9842E+03 3.6653E+04  6.5540E+03−3.6723E+03 6.3324E+02 A10 =  7.5498E+02 −1.4176E+05 −8.7314E+05 −1.1200E+05  3.2602E+04 −3.9956E+03  A12 = −1.9559E+03  1.4495E+061.0098E+07  8.4690E+05 −1.9499E+05 1.1543E+04 A14 =  3.0929E+03−7.9643E+06 −4.3357E+07  −3.0411E+06  6.4532E+05 −1.4255E+04  A16 =−2.9328E+03  2.2161E+07 —  4.3295E+06 −8.6150E+05 5.6438E+03 A18 = 1.5239E+03 −2.4430E+07 — — — — A20 = −3.3121E+02 — — — — —

In Table 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-13 represent the surfacessequentially arranged from the object side to the image side along theoptical axis. In Table 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-20 represent the asphericcoefficients ranging from the 4th order to the 20th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as Table 1 and Table 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

2nd Embodiment

FIG. 4 is a schematic view of an image capturing unit and alight-permeable sheet according to the 2nd embodiment of the presentdisclosure. FIG. 5 is a schematic view of the image capturing unit inFIG. 4. FIG. 6 shows, in order from left to right, spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagecapturing unit according to the 2nd embodiment. In FIG. 4 and FIG. 5,the image capturing unit includes the optical imaging lens assembly (itsreference numeral is omitted) of the present disclosure and an imagesensor 270. The optical imaging lens assembly includes, in order from anobject side to an image side, a first lens element 210, an aperture stop200, a second lens element 220, a stop 201, a third lens element 230, afilter 250 and an image surface 260. The optical imaging lens assemblyincludes three lens elements (210, 220 and 230) with no additional lenselement disposed between each of the adjacent three lens elements. Alight-permeable sheet 240 is disposed between an imaged object O and theoptical imaging lens assembly.

The first lens element 210 with negative refractive power has anobject-side surface 211 being concave in a paraxial region thereof andan image-side surface 212 being concave in a paraxial region thereof.The first lens element 210 is made of plastic material and has theobject-side surface 211 and the image-side surface 212 being bothaspheric. The object-side surface 211 of the first lens element 210 hastwo inflection points. The image-side surface 212 of the first lenselement 210 has one inflection point. The object-side surface 211 of thefirst lens element 210 has one critical point in an off-axis regionthereof.

The second lens element 220 with negative refractive power has anobject-side surface 221 being concave in a paraxial region thereof andan image-side surface 222 being convex in a paraxial region thereof. Thesecond lens element 220 is made of plastic material and has theobject-side surface 221 and the image-side surface 222 being bothaspheric. The object-side surface 221 of the second lens element 220 hastwo inflection points.

The third lens element 230 with positive refractive power has anobject-side surface 231 being convex in a paraxial region thereof and animage-side surface 232 being convex in a paraxial region thereof. Thethird lens element 230 is made of plastic material and has theobject-side surface 231 and the image-side surface 232 being bothaspheric. The object-side surface 231 of the third lens element 230 hasone inflection point. The image-side surface 232 of the third lenselement 230 has two inflection points. The object-side surface 231 ofthe third lens element 230 has one concave critical point in an off-axisregion thereof.

The light-permeable sheet 240 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter250 is made of glass material and located between the third lens element230 and the image surface 260, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 270 is disposed onor near the image surface 260 of the optical imaging lens assembly.

The detailed optical data of the 2nd embodiment are shown in Table 3 andthe aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 0.34 mm, Fno(work) = 1.51, Fno(inf.) = 1.48,HFOV = 60.3 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.195 3 Lens 1 −0.557 (ASP) 0.250 Plastic 1.548 56.0−0.79 4 2.237 (ASP) 0.497 5 Ape. Stop Plano 0.022 6 Lens 2 −16.897 (ASP)0.331 Plastic 1.548 56.0 −34.11 7 −177.620 (ASP) −0.017 8 Stop Plano0.048 9 Lens 3 0.443 (ASP) 0.464 Plastic 1.548 56.0 0.55 10 −0.595 (ASP)0.141 11 Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.410 13 ImagePlano — Note: Reference wavelength is 525.0 nm. The working distance isthe axial distance (2.695 mm) between the imaged object O (Surface 0)and the object-side surface 211 (Surface 3). An effective radius of thestop 201 (Surface 8) is 0.367 mm.

TABLE 4 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −2.8547E+00 0.0000E+00 −9.9000E+01 −9.9000E+01 −3.7987E−01  0.0000E+00 A4 = 2.2704E+00 −2.2735E−01  6.4881E+00 −1.7511E+01 −2.0393E+01  3.3381E+00A6 =  1.2717E+00 −2.1331E+01 −8.0759E+02  1.5106E+02  3.6505E+02−1.8616E+01 A8 = −4.5738E+01  3.9977E+03  3.5737E+04  5.4749E+02−4.8527E+03  1.5686E+02 A10 =  2.0413E+02 −8.1901E+04 −8.5763E+05−2.1367E+04  4.4031E+04 −1.1990E+01 A12 = −4.6969E+02  8.2706E+05 1.0005E+07  9.5418E+04 −2.5463E+05 −5.8214E+03 A14 =  6.2447E+02−4.4633E+06 −4.3272E+07  1.4882E+05  8.0270E+05  2.3138E+04 A16 =−4.7117E+02  1.2128E+07 — −1.0358E+06 −1.0271E+06 −2.5558E+04 A18 = 1.7676E+02 −1.2988E+07 — — — — A20 = −2.1481E+01 — — — — —

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3 and Table 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 0.34 TOB + TL [mm] 4.99 Fno(work) 1.51 (TOB +TL)/EPD 21.68 Fno(inf.) 1.48 TOB/TL 1.18 HFOV [deg.] 60.3 R1/EPD −2.42V1 56.0 R1/f −1.63 V2 56.0 f/EPD 1.48 V3 56.0 f/EPD + cot(HFOV) 2.05Vmax − Vmin 0.0 |f/f1| 0.43 ΣCT/ΣAT 1.90 |f/f2| 0.01 ΣCT/CTP 0.70 |f/f3|0.62 CTP [mm] 1.50 FOV [deg.] 120.7 T12/T23 16.74 Y11/Y32 1.72 TL [mm]2.29 Yc11/Y11 0.57 TL/EPD 9.96 YOB/ImgH 7.70 TL/f 6.72 — —

3rd Embodiment

FIG. 7 is a schematic view of an image capturing unit and alight-permeable sheet according to the 3rd embodiment of the presentdisclosure. FIG. 8 is a schematic view of the image capturing unit inFIG. 7. FIG. 9 shows, in order from left to right, spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagecapturing unit according to the 3rd embodiment. In FIG. 7 and FIG. 8,the image capturing unit includes the optical imaging lens assembly (itsreference numeral is omitted) of the present disclosure and an imagesensor 370. The optical imaging lens assembly includes, in order from anobject side to an image side, a first lens element 310, an aperture stop300, a second lens element 320, a stop 301, a third lens element 330, afilter 350 and an image surface 360. The optical imaging lens assemblyincludes three lens elements (310, 320 and 330) with no additional lenselement disposed between each of the adjacent three lens elements. Alight-permeable sheet 340 is disposed between an imaged object O and theoptical imaging lens assembly.

The first lens element 310 with negative refractive power has anobject-side surface 311 being concave in a paraxial region thereof andan image-side surface 312 being concave in a paraxial region thereof.The first lens element 310 is made of plastic material and has theobject-side surface 311 and the image-side surface 312 being bothaspheric. The object-side surface 311 of the first lens element 310 hastwo inflection points. The image-side surface 312 of the first lenselement 310 has one inflection point. The object-side surface 311 of thefirst lens element 310 has one critical point in an off-axis regionthereof.

The second lens element 320 with positive refractive power has anobject-side surface 321 being convex in a paraxial region thereof and animage-side surface 322 being convex in a paraxial region thereof. Thesecond lens element 320 is made of plastic material and has theobject-side surface 321 and the image-side surface 322 being bothaspheric. The object-side surface 321 of the second lens element 320 hasone inflection point. The object-side surface 321 of the second lenselement 320 has one critical point in an off-axis region thereof.

The third lens element 330 with positive refractive power has anobject-side surface 331 being convex in a paraxial region thereof and animage-side surface 332 being convex in a paraxial region thereof. Thethird lens element 330 is made of plastic material and has theobject-side surface 331 and the image-side surface 332 being bothaspheric. The object-side surface 331 of the third lens element 330 hastwo inflection points. The object-side surface 331 of the third lenselement 330 has one concave critical point in an off-axis regionthereof.

The light-permeable sheet 340 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter350 is made of glass material and located between the third lens element330 and the image surface 360, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 370 is disposed onor near the image surface 360 of the optical imaging lens assembly.

The detailed optical data of the 3rd embodiment are shown in Table 5 andthe aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 0.34 mm, Fno(work) = 1.51, Fno(inf.) = 1.47,HFOV = 60.6 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.200 3 Lens 1 −0.436 (ASP) 0.250 Plastic 1.548 56.0−0.77  4 14.852 (ASP) 0.516 5 Ape. Stop Plano 0.017 6 Lens 2 3.339 (ASP)0.378 Plastic 1.548 56.0 1.76 7 −1.303 (ASP) −0.055 8 Stop Plano 0.085 9Lens 3 0.737 (ASP) 0.397 Plastic 1.548 56.0 0.71 10 −0.663 (ASP) 0.14111 Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.406 13 Image Plano —Note: Reference wavelength is 525.0 nm. The working distance is theaxial distance (2.700 mm) between the imaged object O (Surface 0) andthe obiect-side surface 311 (Surface 3). An effective radius of the stop301 (Surface 8) is 0.373 mm.

TABLE 6 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −4.1142E+000.0000E+00 0.0000E+00 −1.8229E+01  0.0000E+00  0.0000E+00 A4 = 3.2556E+00 4.7410E+00 4.2626E−01 −1.4702E+01 −1.3522E+01  3.0840E+00 A6= −1.0404E+01 −7.9736E+01  −2.6755E+02   2.1493E+02  2.6299E+02−2.4992E+01 A8 =  9.7449E+00 6.3140E+03 9.7871E+03 −2.9870E+03−3.9060E+03  2.4598E+02 A10 =  6.2586E+01 −1.5071E+05  −1.9797E+05  3.2386E+04  3.9361E+04 −8.0729E+02 A12 = −2.8442E+02 1.8456E+061.8359E+06 −2.6144E+05 −2.4813E+05 −2.6956E+03 A14 =  5.6251E+02−1.2686E+07  −6.0396E+06   1.1830E+06  8.4105E+05  1.9545E+04 A16 =−6.1194E+02 4.9153E+07 — −2.1504E+06 −1.1449E+06 −2.7862E+04 A18 = 3.5452E+02 −1.0019E+08  — — — — A20 = −8.5355E+01 8.3515E+07 — — — —

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 5 and Table 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 0.34 TOB + TL [mm] 4.98 Fno(work) 1.51 (TOB +TL)/EPD 21.65 Fno(inf.) 1.47 TOB/TL 1.18 HFOV [deg.] 60.6 R1/EPD −1.89V1 56.0 R1/f −1.29 V2 56.0 f/EPD 1.47 V3 56.0 f/EPD + cot(HFOV) 2.04Vmax − Vmin 0.0 |f/f1| 0.44 ΣCT/ΣAT 1.82 |f/f2| 0.19 ΣCT/CTP 0.68 |f/f3|0.48 CTP [mm] 1.50 FOV [deg.] 121.3 T12/T23 17.77 Y11/Y32 1.83 TL [mm]2.28 Yc11/Y11 0.56 TL/EPD 9.91 YOB/ImgH 7.75 TL/f 6.73 — —

4th Embodiment

FIG. 10 is a schematic view of an image capturing unit and alight-permeable sheet according to the 4th embodiment of the presentdisclosure. FIG. 11 is a schematic view of the image capturing unit inFIG. 10. FIG. 12 shows, in order from left to right, sphericalaberration curves, astigmatic field curves and a distortion curve of theimage capturing unit according to the 4th embodiment. In FIG. 10 andFIG. 11, the image capturing unit includes the optical imaging lensassembly (its reference numeral is omitted) of the present disclosureand an image sensor 470. The optical imaging lens assembly includes, inorder from an object side to an image side, a first lens element 410, anaperture stop 400, a second lens element 420, a stop 401, a third lenselement 430, a filter 450 and an image surface 460. The optical imaginglens assembly includes three lens elements (410, 420 and 430) with noadditional lens element disposed between each of the adjacent three lenselements. A light-permeable sheet 440 is disposed between an imagedobject O and the optical imaging lens assembly.

The first lens element 410 with negative refractive power has anobject-side surface 411 being concave in a paraxial region thereof andan image-side surface 412 being concave in a paraxial region thereof.The first lens element 410 is made of plastic material and has theobject-side surface 411 and the image-side surface 412 being bothaspheric. The object-side surface 411 of the first lens element 410 hastwo inflection points. The image-side surface 412 of the first lenselement 410 has one inflection point. The object-side surface 411 of thefirst lens element 410 has one critical point in an off-axis regionthereof.

The second lens element 420 with positive refractive power has anobject-side surface 421 being convex in a paraxial region thereof and animage-side surface 422 being convex in a paraxial region thereof. Thesecond lens element 420 is made of plastic material and has theobject-side surface 421 and the image-side surface 422 being bothaspheric. The object-side surface 421 of the second lens element 420 hasone inflection point. The object-side surface 421 of the second lenselement 420 has one critical point in an off-axis region thereof.

The third lens element 430 with positive refractive power has anobject-side surface 431 being convex in a paraxial region thereof and animage-side surface 432 being convex in a paraxial region thereof. Thethird lens element 430 is made of plastic material and has theobject-side surface 431 and the image-side surface 432 being bothaspheric. The object-side surface 431 of the third lens element 430 hasone inflection point. The image-side surface 432 of the third lenselement 430 has two inflection points. The object-side surface 431 ofthe third lens element 430 has one concave critical point in an off-axisregion thereof.

The light-permeable sheet 440 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter450 is made of glass material and located between the third lens element430 and the image surface 460, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 470 is disposed onor near the image surface 460 of the optical imaging lens assembly.

The detailed optical data of the 4th embodiment are shown in Table 7 andthe aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 0.34 mm, Fno(work) = 1.50, Fno(inf.) = 1.47,HFOV = 60.6 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.193 3 Lens 1 −0.547 (ASP) 0.250 Plastic 1.548 56.0−0.77  4 2.144 (ASP) 0.507 5 Ape. Stop Plano 0.021 6 Lens 2 11.897 (ASP)0.356 Plastic 1.548 56.0 2.10 7 −1.262 (ASP) −0.041 8 Stop Plano 0.071 9Lens 3 0.670 (ASP) 0.433 Plastic 1.548 56.0 0.67 10 −0.631 (ASP) 0.14111 Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.407 13 Image Plano —Note: Reference wavelength is 525.0 nm. The working distance is theaxial distance (2.693 mm) between the imaged object O (Surface 0) andthe object-side surface 411 (Surface 3). An effective radius of theobject-side surface 411 (Surface 3) is 0.808 mm. An effective radius ofthe stop 401 (Surface 8) is 0.367 mm.

TABLE 8 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −2.7474E+000.0000E+00 0.0000E+00 −2.6564E+01  0.0000E+00 0.0000E+00 A4 = 2.5847E+00 −3.3982E−01  3.7716E−01 −1.2218E+01 −1.2259E+01 3.0626E+00A6 =  8.3383E−01 2.3647E+01 −4.0284E+02   1.0437E+02  2.1968E+02−1.7542E+01  A8 = −5.6746E+01 2.8880E+03 2.0833E+04 −1.1226E+03−3.1338E+03 1.1424E+02 A10 =  2.8531E+02 −6.7930E+04  −5.4603E+05  2.5172E+04  3.2488E+04 5.7786E+02 A12 = −7.3981E+02 7.2672E+056.5224E+06 −3.7852E+05 −2.1418E+05 −9.9595E+03  A14 =  1.1281E+03−4.0577E+06  −2.7552E+07   2.3890E+06  7.4606E+05 3.6968E+04 A16 =−1.0111E+03 1.1268E+07 — −5.2416E+06 −1.0260E+06 −4.2931E+04  A18 = 4.8732E+02 −1.2239E+07  — — — — A20 = −9.5583E+01 — — — — —

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 7 and Table 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 0.34 TOB + TL [mm] 4.98 Fno(work) 1.50 (TOB +TL)/EPD 21.66 Fno(inf.) 1.47 TOB/TL 1.18 HFOV [deg.] 60.6 R1/EPD −2.38V1 56.0 R1/f −1.62 V2 56.0 f/EPD 1.47 V3 56.0 f/EPD + cot(HFOV) 2.04Vmax − Vmin 0.0 |f/f1| 0.44 ΣCT/ΣAT 1.86 |f/f2| 0.16 ΣCT/CTP 0.69 |f/f3|0.50 CTP [mm] 1.50 FOV [deg.] 121.2 T12/T23 17.60 Y11/Y32 1.70 TL [mm]2.29 Yc11/Y11 0.57 TL/EPD 9.96 YOB/ImgH 7.76 TL/f 6.76 — —

5th Embodiment

FIG. 13 is a schematic view of an image capturing unit and alight-permeable sheet according to the 5th embodiment of the presentdisclosure. FIG. 14 is a schematic view of the image capturing unit inFIG. 13. FIG. 15 shows, in order from left to right, sphericalaberration curves, astigmatic field curves and a distortion curve of theimage capturing unit according to the 5th embodiment. In FIG. 13 andFIG. 14, the image capturing unit includes the optical imaging lensassembly (its reference numeral is omitted) of the present disclosureand an image sensor 570. The optical imaging lens assembly includes, inorder from an object side to an image side, a first lens element 510, anaperture stop 500, a second lens element 520, a stop 501, a third lenselement 530, a filter 550 and an image surface 560. The optical imaginglens assembly includes three lens elements (510, 520 and 530) with noadditional lens element disposed between each of the adjacent three lenselements. A light-permeable sheet 540 is disposed between an imagedobject O and the optical imaging lens assembly.

The first lens element 510 with negative refractive power has anobject-side surface 511 being concave in a paraxial region thereof andan image-side surface 512 being convex in a paraxial region thereof. Thefirst lens element 510 is made of plastic material and has theobject-side surface 511 and the image-side surface 512 being bothaspheric. The object-side surface 511 of the first lens element 510 hastwo inflection points. The image-side surface 512 of the first lenselement 510 has two inflection points. The object-side surface 511 ofthe first lens element 510 has one critical point in an off-axis regionthereof. The image-side surface 512 of the first lens element 510 hasone critical point in an off-axis region thereof.

The second lens element 520 with positive refractive power has anobject-side surface 521 being concave in a paraxial region thereof andan image-side surface 522 being convex in a paraxial region thereof. Thesecond lens element 520 is made of plastic material and has theobject-side surface 521 and the image-side surface 522 being bothaspheric.

The third lens element 530 with positive refractive power has anobject-side surface 531 being concave in a paraxial region thereof andan image-side surface 532 being convex in a paraxial region thereof. Thethird lens element 530 is made of plastic material and has theobject-side surface 531 and the image-side surface 532 being bothaspheric. The object-side surface 531 of the third lens element 530 hasone inflection point. The object-side surface 531 of the third lenselement 530 has one critical point in an off-axis region thereof.

The light-permeable sheet 540 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter550 is made of glass material and located between the third lens element530 and the image surface 560, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 570 is disposed onor near the image surface 560 of the optical imaging lens assembly.

The detailed optical data of the 5th embodiment are shown in Table 9 andthe aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 0.38 mm, Fno(work) = 1.49, Fno(inf.) = 1.44,HFOV = 55.3 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.194 3 Lens 1 −0.462 (ASP) 0.271 Plastic 1.548 56.0−1.08  4 −2.586 (ASP) 0.520 5 Ape. Stop Plano 0.036 6 Lens 2 −26.785(ASP) 0.384 Plastic 1.548 56.0 0.72 7 −0.388 (ASP) −0.044 8 Stop Plano0.074 9 Lens 3 −6.513 (ASP) 0.353 Plastic 1.549 55.9 1.69 10 −0.826(ASP) 0.141 11 Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.407 13Image Plano — Note: Reference wavelength is 525.0 nm. The workingdistance is the axial distance (2.694 mm) between the imaged object O(Surface 0) and the object-side surface 511 (Surface 3). An effectiveradius of the stop 501 (Surface 8) is 0.334 mm.

TABLE 10 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −7.3315E+000.0000E+00 0.0000E+00 −6.6435E+00 0.0000E+00 0.0000E+00 A4 =  2.8711E+009.8086E+00 −5.2973E+00  −1.0256E+01 2.1517E+00 4.3028E−01 A6 =−1.3303E+01 −4.8622E+01  8.6876E+01  7.9950E+01 −4.2852E+01  7.0421E+00A8 =  5.2549E+01 9.4080E+01 −5.4282E+03  −3.2189E+02 5.3498E+02−1.1447E+02  A10 = −1.5612E+02 7.3215E+03 1.2572E+05 −1.0064E+04−3.6438E+03  1.1959E+03 A12 =  3.3558E+02 −1.4199E+05  −1.4564E+06  1.7673E+05 8.9542E+03 −7.7594E+03  A14 = −4.9605E+02 1.2954E+065.3911E+06 −1.1929E+06 2.4402E+04 2.6320E+04 A16 =  4.7241E+02−6.2122E+06  —  2.8798E+06 −1.2316E+05  −3.5260E+04  A18 = −2.6046E+021.4810E+07 — — — — A20 =  6.3093E+01 −1.3782E+07  — — — —

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 9 and Table 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 0.38 TOB + TL [mm] 4.98 Fno(work) 1.49 (TOB +TL)/EPD 19.16 Fno(inf.) 1.44 TOB/TL 1.18 HFOV [deg.] 55.3 R1/EPD −1.78V1 56.0 R1/f −1.23 V2 56.0 f/EPD 1.44 V3 55.9 f/EPD + cot(HFOV) 2.14Vmax − Vmin 0.1 |f/f1| 0.35 ΣCT/ΣAT 1.72 |f/f2| 0.52 ΣCT/CTP 0.67 |f/f3|0.22 CTP [mm] 1.50 FOV [deg.] 110.7 T12/T23 18.53 Y11/Y32 2.05 TL [mm]2.29 Yc11/Y11 0.50 TL/EPD 8.80 YOB/ImgH 6.99 TL/f 6.09 — —

6th Embodiment

FIG. 16 is a schematic view of an image capturing unit and alight-permeable sheet according to the 6th embodiment of the presentdisclosure. FIG. 17 is a schematic view of the image capturing unit inFIG. 16. FIG. 18 shows, in order from left to right, sphericalaberration curves, astigmatic field curves and a distortion curve of theimage capturing unit according to the 6th embodiment. In FIG. 16 andFIG. 17, the image capturing unit includes the optical imaging lensassembly (its reference numeral is omitted) of the present disclosureand an image sensor 670. The optical imaging lens assembly includes, inorder from an object side to an image side, a first lens element 610, anaperture stop 600, a second lens element 620, a stop 601, a third lenselement 630, a filter 650 and an image surface 660. The optical imaginglens assembly includes three lens elements (610, 620 and 630) with noadditional lens element disposed between each of the adjacent three lenselements. A light-permeable sheet 640 is disposed between an imagedobject O and the optical imaging lens assembly.

The first lens element 610 with negative refractive power has anobject-side surface 611 being concave in a paraxial region thereof andan image-side surface 612 being convex in a paraxial region thereof. Thefirst lens element 610 is made of plastic material and has theobject-side surface 611 and the image-side surface 612 being bothaspheric. The object-side surface 611 of the first lens element 610 hastwo inflection points. The image-side surface 612 of the first lenselement 610 has two inflection points. The object-side surface 611 ofthe first lens element 610 has one critical point in an off-axis regionthereof. The image-side surface 612 of the first lens element 610 hasone critical point in an off-axis region thereof.

The second lens element 620 with positive refractive power has anobject-side surface 621 being convex in a paraxial region thereof and animage-side surface 622 being concave in a paraxial region thereof. Thesecond lens element 620 is made of plastic material and has theobject-side surface 621 and the image-side surface 622 being bothaspheric. The object-side surface 621 of the second lens element 620 hasone inflection point. The image-side surface 622 of the second lenselement 620 has one inflection point. The object-side surface 621 of thesecond lens element 620 has one critical point in an off-axis regionthereof. The image-side surface 622 of the second lens element 620 hasone critical point in an off-axis region thereof.

The third lens element 630 with positive refractive power has anobject-side surface 631 being convex in a paraxial region thereof and animage-side surface 632 being convex in a paraxial region thereof. Thethird lens element 630 is made of plastic material and has theobject-side surface 631 and the image-side surface 632 being bothaspheric. The object-side surface 631 of the third lens element 630 hasone inflection point. The object-side surface 631 of the third lenselement 630 has one concave critical point in an off-axis regionthereof.

The light-permeable sheet 640 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter650 is made of glass material and located between the third lens element630 and the image surface 660, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 670 is disposed onor near the image surface 660 of the optical imaging lens assembly.

The detailed optical data of the 6th embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 0.35 mm, Fno(work) = 1.42, Fno(inf.) = 1.39,HFOV = 58.9 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.230 3 Lens 1 −0.376 (ASP) 0.250 Plastic 1.548 56.0−0.99  4 −1.500 (ASP) 0.585 5 Ape. Stop Plano 0.016 6 Lens 2 2.019 (ASP)0.355 Plastic 1.548 56.0 6.42 7 4.444 (ASP) −0.032 8 Stop Plano 0.062 9Lens 3 0.426 (ASP) 0.402 Plastic 1.548 56.0 0.57 10 −0.763 (ASP) 0.14111 Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.325 13 Image Plano —Note: Reference wavelength is 525.0 nm. The working distance is theaxial distance (2.730 mm) between the imaged object O (Surface 0) andthe object-side surface 611 (Surface 3). An effective radius of the stop601 (Surface 8) is 0.360 mm.

TABLE 12 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −9.7679E−010.0000E+00 0.0000E+00 0.0000E+00  0.0000E+00 0.0000E+00 A4 =  7.2360E+003.8938E−01 −4.8910E+00  −2.8604E+01  −2.4924E+01 9.5915E−01 A6 =−2.5942E+01 1.0277E+02 4.2544E+01 8.0429E+02  5.3332E+02 4.5029E+01 A8 = 6.7172E+01 −7.1202E+02  1.3150E+03 −2.0736E+04  −1.0110E+04−9.6194E+02  A10 = −1.1472E+02 −1.4542E+03  −7.9071E+04  3.5633E+05 1.2507E+05 1.0027E+04 A12 =  1.2453E+02 4.8952E+04 1.0606E+06−3.7781E+06  −9.3031E+05 −5.6264E+04  A14 = −8.0696E+01 −2.7050E+05 −4.2422E+06  2.3335E+07  3.7070E+06 1.5750E+05 A16 =  2.7102E+016.1710E+05 — −7.6413E+07  −6.0887E+06 −1.7113E+05  A18 = −3.2583E+00−5.1445E+05  — 1.0204E+08 — —

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 11 and Table 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 0.35 TOB + TL [mm] 4.98 Fno(work) 1.42 (TOB +TL)/EPD 19.92 Fno(inf.) 1.39 TOB/TL 1.21 HFOV [deg.] 58.9 R1/EPD −1.50V1 56.0 R1/f −1.08 V2 56.0 f/EPD 1.39 V3 56.0 f/EPD + cot(HFOV) 1.99Vmax − Vmin 0.0 |f/f1| 0.35 ΣCT/ΣAT 1.60 |f/f2| 0.05 ΣCT/CTP 0.67 |f/f3|0.61 CTP [mm] 1.50 FOV [deg.] 117.9 T12/T23 20.03 Y11/Y32 2.07 TL [mm]2.25 Yc11/Y11 0.56 TL/EPD 9.00 YOB/ImgH 7.76 TL/f 6.49 — —

7th Embodiment

FIG. 19 is a schematic view of an image capturing unit and alight-permeable sheet according to the 7th embodiment of the presentdisclosure. FIG. 20 is a schematic view of the image capturing unit inFIG. 19. FIG. 21 shows, in order from left to right, sphericalaberration curves, astigmatic field curves and a distortion curve of theimage capturing unit according to the 7th embodiment. In FIG. 19 andFIG. 20, the image capturing unit includes the optical imaging lensassembly (its reference numeral is omitted) of the present disclosureand an image sensor 770. The optical imaging lens assembly includes, inorder from an object side to an image side, a first lens element 710, anaperture stop 700, a second lens element 720, a stop 701, a third lenselement 730, a filter 750 and an image surface 760. The optical imaginglens assembly includes three lens elements (710, 720 and 730) with noadditional lens element disposed between each of the adjacent three lenselements. A light-permeable sheet 740 is disposed between an imagedobject O and the optical imaging lens assembly.

The first lens element 710 with negative refractive power has anobject-side surface 711 being concave in a paraxial region thereof andan image-side surface 712 being convex in a paraxial region thereof. Thefirst lens element 710 is made of plastic material and has theobject-side surface 711 and the image-side surface 712 being bothaspheric. The object-side surface 711 of the first lens element 710 hastwo inflection points. The image-side surface 712 of the first lenselement 710 has two inflection points. The object-side surface 711 ofthe first lens element 710 has one critical point in an off-axis regionthereof. The image-side surface 712 of the first lens element 710 hasone critical point in an off-axis region thereof.

The second lens element 720 with positive refractive power has anobject-side surface 721 being convex in a paraxial region thereof and animage-side surface 722 being concave in a paraxial region thereof. Thesecond lens element 720 is made of plastic material and has theobject-side surface 721 and the image-side surface 722 being bothaspheric. The object-side surface 721 of the second lens element 720 hasone inflection point. The image-side surface 722 of the second lenselement 720 has one inflection point. The object-side surface 721 of thesecond lens element 720 has one critical point in an off-axis regionthereof. The image-side surface 722 of the second lens element 720 hasone critical point in an off-axis region thereof.

The third lens element 730 with positive refractive power has anobject-side surface 731 being convex in a paraxial region thereof and animage-side surface 732 being convex in a paraxial region thereof. Thethird lens element 730 is made of plastic material and has theobject-side surface 731 and the image-side surface 732 being bothaspheric. The object-side surface 731 of the third lens element 730 hasone inflection point. The image-side surface 732 of the third lenselement 730 has one inflection point. The object-side surface 731 of thethird lens element 730 has one concave critical point in an off-axisregion thereof.

The light-permeable sheet 740 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter750 is made of glass material and located between the third lens element730 and the image surface 760, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 770 is disposed onor near the image surface 760 of the optical imaging lens assembly.

The detailed optical data of the 7th embodiment are shown in Table 13and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 0.35 mm, Fno(work) = 1.42, Fno(inf.) = 1.38,HFOV = 58.9 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.235 3 Lens 1 −0.352 (ASP) 0.250 Plastic 1.548 56.0−1.01  4 −1.204 (ASP) 0.580 5 Ape. Stop Plano 0.017 6 Lens 2 2.085 (ASP)0.356 Plastic 1.548 56.0 4.65 7 10.815 (ASP) −0.027 8 Stop Plano 0.057 9Lens 3 0.446 (ASP) 0.402 Plastic 1.548 56.0 0.58 10 −0.767 (ASP) 0.14111 Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.325 13 Image Plano —Note: Reference wavelength is 525.0 nm. The working distance is theaxial distance (2.735 mm) between the imaged object O (Surface 0) andthe object-side surface 711 (Surface 3). An effective radius of the stop701 (Surface 8) is 0.364 mm.

TABLE 14 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −2.6744E+00 0.0000E+00  0.0000E+00 0.0000E+00  0.0000E+00 0.0000E+00 A4 = 4.0273E+002.0226E+00 −4.5804E+00 −2.6082E+01  −2.2819E+01 8.8871E−01 A6 =−1.5893E+01  8.1721E+01 −1.4527E+00 7.0936E+02  4.7411E+02 4.6866E+01 A8= 4.1513E+01 −5.4474E+02   3.4190E+03 −1.8115E+04  −8.7964E+03−1.0048E+03  A10 = −6.8417E+01  −2.2335E+03  −1.2555E+05 3.0732E+05 1.0689E+05 1.0471E+04 A12 = 6.8890E+01 5.1060E+04  1.5337E+06−3.1980E+06  −7.7845E+05 −5.8463E+04  A14 = −3.8724E+01  −2.7369E+05 −5.9861E+06 1.9282E+07  3.0249E+06 1.6269E+05 A16 = 9.2113E+006.1955E+05 — −6.1371E+07  −4.8133E+06 −1.7584E+05  A18 = 1.9837E−02−5.1518E+05  — 7.9516E+07 — —

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 13 and Table 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 0.35 TOB + TL [mm] 4.98 Fno(work) 1.42 (TOB +TL)/EPD 19.92 Fno(inf.) 1.38 TOB/TL 1.22 HFOV [deg.] 58.9 R1/EPD −1.41V1 56.0 R1/f −1.02 V2 56.0 f/EPD 1.38 V3 56.0 f/EPD + cot(HFOV) 1.98Vmax − Vmin 0.0 |f/f1| 0.34 ΣCT/ΣAT 1.61 |f/f2| 0.07 ΣCT/CTP 0.67 |f/f3|0.59 CTP [mm] 1.50 FOV [deg.] 117.8 T12/T23 19.90 Y11/Y32 2.06 TL [mm]2.25 Yc11/Y11 0.57 TL/EPD 8.98 YOB/ImgH 7.76 TL/f 6.50 — —

8th Embodiment

FIG. 22 is a schematic view of an image capturing unit and alight-permeable sheet according to the 8th embodiment of the presentdisclosure. FIG. 23 is a schematic view of the image capturing unit inFIG. 22. FIG. 24 shows, in order from left to right, sphericalaberration curves, astigmatic field curves and a distortion curve of theimage capturing unit according to the 8th embodiment. In FIG. 22 andFIG. 23, the image capturing unit includes the optical imaging lensassembly (its reference numeral is omitted) of the present disclosureand an image sensor 870. The optical imaging lens assembly includes, inorder from an object side to an image side, a first lens element 810, anaperture stop 800, a second lens element 820, a stop 801, a third lenselement 830, a filter 850 and an image surface 860. The optical imaginglens assembly includes three lens elements (810, 820 and 830) with noadditional lens element disposed between each of the adjacent three lenselements. A light-permeable sheet 840 is disposed between an imagedobject O and the optical imaging lens assembly.

The first lens element 810 with negative refractive power has anobject-side surface 811 being concave in a paraxial region thereof andan image-side surface 812 being convex in a paraxial region thereof. Thefirst lens element 810 is made of glass material and has the object-sidesurface 811 and the image-side surface 812 being both aspheric. Theobject-side surface 811 of the first lens element 810 has two inflectionpoints. The image-side surface 812 of the first lens element 810 has twoinflection points. The object-side surface 811 of the first lens element810 has one critical point in an off-axis region thereof. The image-sidesurface 812 of the first lens element 810 has one critical point in anoff-axis region thereof.

The second lens element 820 with negative refractive power has anobject-side surface 821 being convex in a paraxial region thereof and animage-side surface 822 being concave in a paraxial region thereof. Thesecond lens element 820 is made of plastic material and has theobject-side surface 821 and the image-side surface 822 being bothaspheric. The object-side surface 821 of the second lens element 820 hasone inflection point. The image-side surface 822 of the second lenselement 820 has one inflection point. The object-side surface 821 of thesecond lens element 820 has one critical point in an off-axis regionthereof. The image-side surface 822 of the second lens element 820 hasone critical point in an off-axis region thereof.

The third lens element 830 with positive refractive power has anobject-side surface 831 being convex in a paraxial region thereof and animage-side surface 832 being convex in a paraxial region thereof. Thethird lens element 830 is made of plastic material and has theobject-side surface 831 and the image-side surface 832 being bothaspheric. The object-side surface 831 of the third lens element 830 hastwo inflection points. The object-side surface 831 of the third lenselement 830 has one concave critical point in an off-axis regionthereof.

The light-permeable sheet 840 is made of glass material and will notaffect the focal length of the optical imaging lens assembly. The filter850 is made of glass material and located between the third lens element830 and the image surface 860, and will not affect the focal length ofthe optical imaging lens assembly. The image sensor 870 is disposed onor near the image surface 860 of the optical imaging lens assembly.

The detailed optical data of the 8th embodiment are shown in Table 15and the aspheric surface data are shown in Table 16 below.

TABLE 15 8th Embodiment f = 0.35 mm, Fno(work) = 1.42, Fno(inf.) = 1.38,HFOV = 59.0 deg. Surface # Curvature Radius Thickness Material IndexAbbe # Focal Length 0 Object Plano 0.000 1 Sheet Plano 1.500 Glass 1.52064.2 — 2 Plano 1.226 3 Lens 1 −0.369 (ASP) 0.250 Glass 1.595 60.6 −1.014 −1.191 (ASP) 0.600 5 Ape. Stop Plano 0.014 6 Lens 2 2.072 (ASP) 0.353Plastic 1.548 56.0 −34.60 7 1.755 (ASP) −0.032 8 Stop Plano 0.062 9 Lens3 0.368 (ASP) 0.395 Plastic 1.548 56.0 0.53 10 −0.825 (ASP) 0.141 11Filter Plano 0.145 Glass 1.520 64.2 — 12 Plano 0.325 13 Image Plano —Note: Reference wavelength is 525.0 nm. The working distance is theaxial distance (2.726 mm) between the imaged object O (Surface 0) andthe object-side surface 811 (Surface 3). An effective radius of the stop801 (Surface 8) is 0.360 mm.

TABLE 16 Aspheric Coefficients Surface # 3 4 6 7 9 10 k = −9.8044E−010.0000E+00 −5.3723E+00 0.0000E+00 −3.0186E−01  0.0000E+00 A4 = 7.4724E+00 2.0516E+00 −1.8068E+00 −3.4506E+01  −2.9561E+01  3.0421E+00A6 = −2.7854E+01 4.4099E+01 −1.0347E+02 9.3900E+02  6.5691E+02−5.1588E+00 A8 =  7.6052E+01 2.3320E+02  4.3079E+03 −2.1737E+04 −1.2044E+04 −2.5079E+02 A10 = −1.3997E+02 −1.0133E+04  −9.3515E+043.3691E+05  1.4185E+05  4.5769E+03 A12 =  1.6847E+02 9.3861E+04 8.2898E+05 −3.2842E+06  −1.0037E+06 −3.4964E+04 A14 = −1.2580E+02−3.9837E+05  −2.4335E+06 1.8881E+07  3.7959E+06  1.1813E+05 A16 = 5.2050E+01 8.0408E+05 — −5.7843E+07  −5.8743E+06 −1.4497E+05 A18 =−8.9777E+00 −6.2437E+05  — 7.2207E+07 — —

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 15 and Table 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 0.35 TOB + TL [mm] 4.98 Fno(work) 1.42 (TOB +TL)/EPD 19.92 Fno(inf.) 1.38 TOB/TL 1.21 HFOV [deg.] 59.0 R1/EPD −1.47V1 60.6 R1/f −1.06 V2 56.0 f/EPD 1.38 V3 56.0 f/EPD + cot(HFOV) 1.99Vmax − Vmin 4.6 |f/f1| 0.34 ΣCT/ΣAT 1.55 |f/f2| 0.01 ΣCT/CTP 0.67 |f/f3|0.66 CTP [mm] 1.50 FOV [deg.] 118.1 T12/T23 20.47 Y11/Y32 2.08 TL [mm]2.25 Yc11/Y11 0.57 TL/EPD 9.01 YOB/ImgH 7.75 TL/f 6.51 — —

9th Embodiment

FIG. 25 is a perspective view of an electronic device according to the9th embodiment of the present disclosure. FIG. 26 is a schematic view ofthe electronic device in FIG. 25 identifying a fingerprint.

In this embodiment, an electronic device 20 is a smartphone having abiometric identification function. The electronic device 20 includes afingerprint identification module 30, an image capturing unit 10 a andthe light-permeable sheet 140 disclosed in the 1st embodiment. The imagecapturing unit 10 a is a front-facing camera of the electronic device 20for taking selfies, and the image capturing unit 10 a includes theoptical imaging lens assembly of the present disclosure and an imagesensor. The fingerprint identification module 30 has a fingerprintidentification function, which includes an image capturing unit 10 b.The image capturing unit 10 b includes the optical imaging lens assemblyof the present disclosure and an image sensor. In this embodiment, eachof the image capturing units 10 a and 10 b is the image capturing unitdisclosed in the 1st embodiment, but the present disclosure is notlimited thereto. For example, in some configurations, only one of theimage capturing units 10 a and 10 b includes the optical imaging lensassembly of the present disclosure.

The light-permeable sheet 140 includes a display layer 141 which canalso provide protection to the screen, thereby minimizing the use ofadditional components. Light rays can travel through the display layer141 into the optical imaging lens assembly of the fingerprintidentification module 30 for wider applications. The display layer 141has a touch-screen function, such that there is no need of additionalinput devices, and it's favorable for making the operation moreintuitive. Furthermore, the display layer 141 may be an OLED displaylayer or an active-matrix organic light-emitting diode (AMOLED) displaylayer, such that the display layer 141 can be a light source forilluminating the imaged object O, thereby saving additional lightsources.

10th Embodiment

FIG. 27 is a perspective view of an electronic device according to the10th embodiment of the present disclosure. FIG. 28 is a schematic viewof the electronic device in FIG. 27 identifying a fingerprint.

In this embodiment, an electronic device 20 a is a smartphone having abiometric identification function. The electronic device 20 a includes afingerprint identification module 30 a and the light-permeable sheet 140disclosed in the 1st embodiment. The fingerprint identification module30 a has a fingerprint identification function, which includes an imagecapturing unit 10 c and a light source S. The image capturing unit 10 cincludes the optical imaging lens assembly of the present disclosure andan image sensor. The light source S is disposed on one side of theoptical imaging lens assembly for illuminating the imaged object O, suchthat light rays from the imaged object O can travel through thelight-permeable sheet 140 into the optical imaging lens assembly of thefingerprint identification module 30 a. In this embodiment, the imagecapturing unit 10 c is the image capturing unit disclosed in the 1stembodiment, but the present disclosure is not limited thereto.

According to the present disclosure, the optical imaging lens assemblyof the image capturing units 10 b and 10 c features good capability inaberration corrections and high image quality, and the image capturingunits 10 b and 10 c can be applied to smartphones for under-displayfingerprint identification, but the present disclosure is not limitedthereto. For example, the image capturing units 10 b and 10 c can beapplied to electronic devices such as digital tablets, portableimage-recording devices and multi-camera devices.

Furthermore, the image capturing units 10 b and 10 c can be applied tobiometric identification and 3D (three-dimensional) image capturingapplications, in products such as digital cameras, mobile devices, smarttelevisions, network surveillance devices, dashboard cameras, vehiclebackup cameras, motion sensing input devices, wearable devices and otherelectronic imaging devices.

The foregoing description, for the purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTABLES 1-16 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An optical imaging lens assembly comprising threelens elements, the three lens elements being, in order from an objectside to an image side, a first lens element, a second lens element and athird lens element, and each of the three lens elements having anobject-side surface facing toward the object side and an image-sidesurface facing toward the image side; wherein the object-side surface ofthe first lens element is concave in a paraxial region thereof, theobject-side surface of the first lens element is aspheric and has atleast one inflection point, the object-side surface of the first lenselement has at least one critical point in an off-axis region thereof,and the optical imaging lens assembly has a total of three lenselements; wherein a focal length of the optical imaging lens assembly isf, an entrance pupil diameter of the optical imaging lens assembly isEPD, a maximum field of view of the optical imaging lens assembly isFOV, and the following conditions are satisfied:0.50<f/EPD<1.9; and100.0 [deg.]<FOV<130.0 [deg.].
 2. The optical imaging lens assembly ofclaim 1, wherein an Abbe number of the first lens element is V1, an Abbenumber of the second lens element is V2, an Abbe number of the thirdlens element is V3, and the following conditions are satisfied:45.0<V1<60.0;45.0<V2<60.0; and45.0<V3<60.0.
 3. The optical imaging lens assembly of claim 1, wherein amaximum value among Abbe numbers of all lens elements of the opticalimaging lens assembly is Vmax, a minimum value among Abbe numbers of alllens elements of the optical imaging lens assembly is Vmin, a sum ofcentral thicknesses of all lens elements of the optical imaging lensassembly is ΣCT, a sum of axial distances between each of all adjacentlens elements of the optical imaging lens assembly is ΣAT, and thefollowing conditions are satisfied:Vmax−Vmin<15.0; and1.2<ΣCT/ΣAT<2.8.
 4. The optical imaging lens assembly of claim 1,wherein an axial distance between the first lens element and the secondlens element is T12, an axial distance between the second lens elementand the third lens element is T23, and the following condition issatisfied:12.5<T12/T23<30.0.
 5. The optical imaging lens assembly of claim 1,wherein an axial distance between the object-side surface of the firstlens element and an image surface is TL, the focal length of the opticalimaging lens assembly is f, and the following condition is satisfied:5.9<TL/f<8.5.
 6. The optical imaging lens assembly of claim 1, wherein acurvature radius of the object-side surface of the first lens element isR1, the focal length of the optical imaging lens assembly is f, and thefollowing condition is satisfied:−2.5<R1/f<0.
 7. The optical imaging lens assembly of claim 1, whereinthe focal length of the optical imaging lens assembly is f, the entrancepupil diameter of the optical imaging lens assembly is EPD, half of themaximum field of view of the optical imaging lens assembly is HFOV, andthe following condition is satisfied:1.0<f/EPD+cot(HFOV)<2.3.
 8. The optical imaging lens assembly of claim1, wherein the first lens element has negative refractive power, thefocal length of the optical imaging lens assembly is f, a focal lengthof the first lens element is f1, a focal length of the second lenselement is f2, a focal length of the third lens element is f3, and thefollowing conditions are satisfied:|f/f1|<0.50;|f/f2|<0.80; and|f/f3|<0.80.
 9. The optical imaging lens assembly of claim 1, whereinthe third lens element has positive refractive power, the object-sidesurface of the third lens element is convex in a paraxial regionthereof, the object-side surface of the third lens element is asphericand has at least one inflection point, the object-side surface of thethird lens element has at least one concave critical point in anoff-axis region thereof, and the image-side surface of the third lenselement is convex in a paraxial region thereof.
 10. The optical imaginglens assembly of claim 1, wherein each of at least two lens elements ofthe optical imaging lens assembly has at least one aspheric surfacehaving at least one inflection point, an axial distance between theobject-side surface of the first lens element and an image surface isTL, the entrance pupil diameter of the optical imaging lens assembly isEPD, and the following conditions are satisfied:TL<3.0 [mm]; and1.0<TL/EPD<16.0.
 11. The optical imaging lens assembly of claim 1,wherein each of at least two lens elements of the optical imaging lensassembly has at least one lens surface having at least one criticalpoint in an off-axis region thereof, a maximum effective radius of theobject-side surface of the first lens element is Y11, a maximumeffective radius of the image-side surface of the third lens element isY32, a vertical distance between the critical point on the object-sidesurface of the first lens element and an optical axis is Yc11, and thefollowing conditions are satisfied:1.25<Y11/Y32<2.40; and0.30<Yc11/Y11<0.90.
 12. The optical imaging lens assembly of claim 1,wherein at least three lens elements of the optical imaging lensassembly are made of plastic material, and the optical imaging lensassembly is operated within a wavelength range of 480 nm to 600 nm. 13.An image capturing unit, comprising: the optical imaging lens assemblyof claim 1; and an image sensor disposed on an image surface of theoptical imaging lens assembly.
 14. An electronic device, comprising: afingerprint identification module comprising the image capturing unit ofclaim
 13. 15. An optical imaging lens assembly comprising three lenselements, the three lens elements being, in order from an object side toan image side, a first lens element, a second lens element and a thirdlens element, and each of the three lens elements having an object-sidesurface facing toward the object side and an image-side surface facingtoward the image side; wherein the object-side surface of the first lenselement is concave in a paraxial region thereof, the object-side surfaceof the first lens element is aspheric and has at least one inflectionpoint, the object-side surface of the first lens element has at leastone critical point in an off-axis region thereof, and the opticalimaging lens assembly has a total of three lens elements; wherein acurvature radius of the object-side surface of the first lens element isR1, an entrance pupil diameter of the optical imaging lens assembly isEPD, and the following condition is satisfied:−4.0<R1/EPD<0.
 16. The optical imaging lens assembly of claim 15,wherein the curvature radius of the object-side surface of the firstlens element is R1, the entrance pupil diameter of the optical imaginglens assembly is EPD, and the following condition is satisfied:−3.0<R1/EPD<−1.0.
 17. The optical imaging lens assembly of claim 15,wherein an axial distance between the object-side surface of the firstlens element and an image surface is TL, a maximum field of view of theoptical imaging lens assembly is FOV, and the following conditions aresatisfied:TL<3.0 [mm]; and100.0 [deg.]<FOV<130.0 [deg.].
 18. The optical imaging lens assembly ofclaim 15, wherein the first lens element has negative refractive power,the third lens element has positive refractive power, and the image-sidesurface of the third lens element is convex in a paraxial regionthereof.
 19. An electronic device, comprising: a fingerprintidentification module comprising an optical imaging lens assembly,wherein the optical imaging lens assembly comprises a plurality of lenselements, each of the plurality of lens elements has an object-sidesurface facing toward an object side of the optical imaging lensassembly and an image-side surface facing toward an image side of theoptical imaging lens assembly, and at least one lens element of theoptical imaging lens assembly has at least one lens surface having atleast one critical point in an off-axis region thereof; and alight-permeable sheet disposed between the optical imaging lens assemblyand an imaged object; wherein a sum of central thicknesses of all lenselements of the optical imaging lens assembly is ΣCT, a centralthickness of the light-permeable sheet is CTP, and the followingcondition is satisfied:0<ΣCT/CTP<1.50.
 20. The electronic device of claim 19, wherein the sumof central thicknesses of all lens elements of the optical imaging lensassembly is ΣCT, the central thickness of the light-permeable sheet isCTP, a maximum field of view of the optical imaging lens assembly isFOV, and the following conditions are satisfied:0.20<ΣCT/CTP<1.10; and100.0 [deg.]<FOV<130.0 [deg.].
 21. The electronic device of claim 19,wherein an axial distance between the object-side surface of one of theplurality of lens elements closest to the imaged object and an imagesurface is TL, a focal length of the optical imaging lens assembly is f,and the following condition is satisfied:5.9<TL/f<8.5.
 22. The electronic device of claim 19, wherein an axialdistance between the imaged object and the object-side surface of one ofthe plurality of lens elements closest to the imaged object is TOB, anaxial distance between the object-side surface of the one of theplurality of lens elements closest to the imaged object and an imagesurface is TL, an entrance pupil diameter of the optical imaging lensassembly is EPD, and the following conditions are satisfied:1.0 [mm]<TOB+TL<7.0 [mm]; and(TOB+TL)/EPD<28.0.
 23. The electronic device of claim 19, wherein acurvature radius of the object-side surface of one of the plurality oflens elements closest to the imaged object is R1, an entrance pupildiameter of the optical imaging lens assembly is EPD, and the followingcondition is satisfied:−4.0<R1/EPD<0.
 24. The electronic device of claim 19, wherein a maximumimage height of the optical imaging lens assembly is ImgH, an objectheight corresponding to the maximum image height of the optical imaginglens assembly is YOB, and the following condition is satisfied:2.0<YOB/ImgH<9.0.
 25. The electronic device of claim 19, wherein atleast three lens elements of the optical imaging lens assembly are madeof plastic material, an axial distance between the imaged object and theobject-side surface of one of the plurality of lens elements closest tothe imaged object is TOB, an axial distance between the object-sidesurface of the one of the plurality of lens elements closest to theimaged object and an image surface is TL, and the following condition issatisfied:0.50<TOB/TL<2.0.
 26. The electronic device of claim 19, wherein theoptical imaging lens assembly comprises three lens elements, the threelens elements are, in order from the object side to the image side, afirst lens element, a second lens element and a third lens element, andthe optical imaging lens assembly has a total of three lens elements.27. The electronic device of claim 26, wherein each of at least two lenselements of the optical imaging lens assembly has at least one lenssurface having at least one critical point in an off-axis regionthereof, the object-side surface of the first lens element is concave ina paraxial region thereof, the object-side surface of the first lenselement is aspheric and has at least one inflection point, and theobject-side surface of the first lens element has at least one criticalpoint in an off-axis region thereof.
 28. The electronic device of claim26, wherein the first lens element has negative refractive power, thethird lens element has positive refractive power, and the image-sidesurface of the third lens element is convex in a paraxial regionthereof.
 29. The electronic device of claim 19, wherein the opticalimaging lens assembly is operated within a wavelength of 480 nm to 600nm.
 30. The electronic device of claim 19, wherein the light-permeablesheet comprises a display layer with touch-screen function, the displaylayer is light-permeable, the central thickness of the light-permeablesheet is CTP, and the following condition is satisfied:0.2 [mm]<CTP<3.0 [mm].